title: Time-resolved photoluminescence of Zn(OH)2 and its composites with graphite oxides.
abstract: Time-resolved photoluminescence is used to determine carrier recombination through radiative and nonradiative processes in zinc hydroxide Zn(OH)(2) and its porous composites with graphite oxide (GO). The decay times, measured by a streak camera, are found to be larger for zinc hydroxide (~1215±156 ps) than its composites (~976±81 ps for ZnGO-2 and 742±59 ps for ZnGO-5), but no significant changes in rise times (from 4.0 to 5.0 ps) are recorded. The dominant mechanism for the radiative process is attributed to free carrier recombination, while microporous networks present in these materials are found to be pathways for the nonradiative recombination process via multiphonon emission.
authors.affiliation: Department of Electrical Engineering, The City College of New York, 160 Convent Ave., New York 10031, USA.
authors.forename: Sm Z
authors.initials: SZ
authors.lastname: Islam
authors.forename: Taposh
authors.initials: T
authors.lastname: Gayen
authors.forename: Bidyut B
authors.initials: BB
authors.lastname: Das
authors.forename: Lingyan
authors.initials: L
authors.lastname: Shi
authors.forename: Mykola
authors.initials: M
authors.lastname: Seredych
authors.forename: Alaa
authors.initials: A
authors.lastname: Moussawi
authors.forename: Teresa J
authors.initials: TJ
authors.lastname: Bandosz
authors.forename: Robert
authors.initials: R
authors.lastname: Alfano
mesh_terms: D006108:Graphite / Q000737:chemistry*; D006878:Hydroxides / Q000737:chemistry*; D008163:Luminescent Measurements; D010087:Oxides / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors; D017967:Zinc Compounds / Q000737:chemistry*
chemical_list: D006878:Hydroxides; D010087:Oxides; D017967:Zinc Compounds; D006108:Graphite; C052745:zinc hydroxide